Electrical connector.



J. C. ROLTGEL y ELECTRICAL NNEGTGR. APPLIGATION rlLE' MAY 2o, 1910.

UNITED 'ELECTRICAL CONNECTOR;

Specification of Letters Patent.v

PATENT FICE.

JAMEscHARLEsRoYCE, oF TonoN'ro, 'oNTn-n'm, CANADA. l

repented Mai-.26, 1912.

i Application tiled May 20, 1910. Serial o. $62,412.

To all whom 'it may concern:

Be it known that I, JAMES CIrAnnEs Royce, a sulueetof the King of Great Britain, and resident of the'city'of Toronto,

cured in Van insulated make electrical contact with tubular con- 'V tact member, and whereby; the wire' leading ectoris' county of York, Province of Ontario, inthe Dominion of Canada., have Ainvented certain new and useful Im rovementsfin Electrical (`onnectors; and I do hereby` declare that the following is a fu llclear, and. exact description ofthe same. v

lhe invention relates .to improvements 1n electrical connectors, as described 'in the following specification 'and ,illustrated in the accompanying vdrawingslthat :form part of the same. `Jj 'i The i invention consists''essentially'- in the novel construction and'` arrangement of parts, whereby a -splitrpin expansibly 'se-` to the removable portion of the Iconn held hy a hlockclaln'ped thereon.`

The objects of the'invention-'are to olatainv a perfect electrical contact. in asepa.- rable connector,-to-allow the adjustment of the contact members incase of -\vea r, to ob-,. viate the hreakrngoffthe?wireslleadlng to the removable portiono thefconnector, and to devise a'sunpleand cheap form' of connector in which the-separable' portion willl hold securely.

In the drawings, Figure 1 is a perspective 'view of the connector showing the ltwo members separated and the upper block of each partly broken away. Fig. 2 is a plan View of the connector with the upper or covering. blocks removed and showing the members joined together. Fig; 3 is Aa verticalllongitudinal sectional View through the center of one of the electrical contacts.

Lilie numerals vof :reference indicate corresponding parts in each ligure.

Referring to the drawings, l is aA block of insulating material formed with a pair of` recesses 2 in the upper face thereof and a holt hole 8 extending through the center.

The recesses 2 are. formed to receive the round headed split pins l and are preterahly just one-half the depth of said pins. The semi-cylindrical portions of the said recesses are slightly larger than the stein portions of the said pins.

5 are countersuulc head screws extending through the head portions ol the split. pins ssaidheads being countersunk on the block .is fadaptedfto'v The screws 5 extend through the block l amd the support 6 upon which the block rests and are connected to electrical c0nof the support 6c l S isa block similarly formed to the block l and. fittinfr over the top thereofud resting snugly tv own upon the top of the pins 4, `said hloclc being'secured in place' by the screw 9.' T he stein ends of the pins 4 prothey lsire secured u znd the outer ends-thereof are rounded off.- 1 0 is a blockof insulatingunaterial hav- -ing apoiiofA semi-cylindrical shaped recesses v1l ,formedin the upper face thereof, said recesseshein'g. slightly. reduced at the cud in ,llat portidns 13. 14 is a'recess formed at thc vother end of the llatteneA recesses '13.

'the' hlockmlid communicating with both o't' z u'raligedfi-{ln .leading outwardly from the recess 14 to the outer eudof the block 10.

block 10 amlcentrally arrangedfin @e rcccss l-t. l v 17 are .tubular contact n'iexnloers resting snugly in the senii-cylim'lricalf recesses 11 having their forward ends Yabutting the shoulders formed by the reduced portions l2 of said recesses. 'The oppnsite ends of the contacts 17 are. llatteued/but and rest upon the lat surfaces oli' the j'ccesses 13.

yl are bolts extending thdough suitable holt holes in the flattened enlls of the contacts' lT'und having their heads coilut-ersunk into suitable recesses in the bottoni of the recesses 13, said bolts forn'iiug binding screws. l

19 is a hlockadapted to tit into the recess 14 and having its outer edges cutaway to the underside forming grooyesadapted to receive the wires 20 leading -iaiwardly down tightly upon the said wires; by a nut. 21 threaded of the boltfQ extending up# waixllj througllgthe.' holt holejltlll 2S is .i block iitsimilar formalimrto lthe block 10 adapted tfo'tt over the 'tubular confvv tarts 17 andto mnupletely close in Mie-atop upperside to allowthe heads ofthe screws` 'l to .tit-snugly thereinto and flush qnthe top.

ject Qutwardly beyond the blocks in which forwurdfendll2 and terininatii'ig at the rear 16 is a bolt hole extending til/rough the tln'ough the recess lo. The terminal ends of the wires Q0 are secured vto tlielb'oltsl by suitable nuts and the block 19 is clau'ipeci uector strips `7 secured on tlle'opposite side so y 'lo' is aise u'i-cyliinlricalv recess centrally nimm.

of said block 10. The co\'er block 23 is clamped down securely to the block by the nut Q4 threaded on to the bolt 22 and by the bolt 25 extendino through both. of said blocks and arranged between the contacts 17. 426 is' a spring coil encirclingthe ivires lcading` to the removable portion of the connector and secured at the inner end in the recess 14. y 10 The tubular contact members are held a n lvery securely in place andv cannot become i dislodged and being unbroken in their cypanded so as to be too loose'for the proper sulated the one from the other and a short f circuit cannot accidentally be made between their terminal ends, j The split pins 4 which are adapted .to fit snugly into the tubular contacts. 17 engage the side walls of said contacts-and make a perfect electrical contact therewith, The pin lmembers are formed up of semi-circular'shaped wire and the I'lat meeting faces are always held slightly apart and the tuiov portions have in outward springing tension. j

In the-event of the pins '4 becoming -slig'htly worn and the members becoming a little loose, it is' merely necessary to remove the cover block 8 'and 'tighten the A screws 5 slightly.` The counter-sunk heads V of the screws 5 press into the counter-sunk heads of the pins and spread the two members kforming the stemof the pins apart. 4Any desired spring outward tension' may be thus given to the said pins so that when the removable portion of the connector is forced on to the ends of'said pins, it will be held verysecurely in place and will not come apart very readily. 'The clamping block 'i9 is a very important feature, as it grips the wires leading to the tubular contacts very securely and for a considerable length, `thus relieving the strain. upon the terminal ends of the wire, where the are connected to the tubular contact mem ers.V l This form 'of-connector is particularly adapted for usein electric stoves, heaters, irons and other such like utensils. Split 3 'pins are well known' and a's the tubular por,- 4tions are very easily in'ade out of lengths of tubing, thecost of manufacture is excep- 5 tionally low. I n 1 What I claim as my invention is 1. In an electricalconnector, the comlindrical shape they cannotbeV unduly ex.

reception and contact ofthe pins 4. Fur-4 ther the said contacts 17 are completely inbination uitha suitable socket mcm'ber, of

a block of insulating material, an e'xpans'iblc' secured in said block-and having a trans verse lorifice therethrough, and a tapered spreaderl adjustably secured in said block and extending through the orifice in said pin. A

3. In an, electrical connector, the com-A bination with a suitableA socket 1nember,of

a block of insulating material, a split pin.- i

formed of semi-cylindricall shaped wvire doubled and formed with a' looped head, a counter-sunk headed screw extending through the looped head of sai'dpin and linto said block, and a threaded member secured to said block and adapted to receive the threaded end` of said screw.

4. In anelectrical connector, the combination with a suitable socket member, of a block of insulatinv material having a recess formed in the Iaee thereof opening to one edge, an expansible longitudinally split pin having. its head resting in said recess land the stem extending beyond one' edge of said block, adjustable means for expanding said pin secured in said block and extending through the split of said pin, an -insulatino' block adapted to fit over the aforesaid block to completelycover in the head ortion of said pin resting in the aforesaid lock, and means for clamping said blocks together.

5. In an electrical connector, the combination with a suitable socket member, of av block of insulating material, an expansible longitudinally split pin resting in said block, an electrical conductor connected to said block', and an adjustable expanding member an electrical connection. between said conductor.4 y

Signed at the city of Toronto, county of York, Province of Ontario, in the Dominion -of Canada.l this 18th day of May, 1910.

Witnesses: H. DENNIsoN, E. HERON# 'extending transversely through the split` of lsaid pin and formin pin and said electrical. 

